Shenhua Printing Plate and Die Pad: Special Anti-wear and Anti-debris Solution for Modelling with Kraft Paper

Kraft paper, with its high strength, environmental friendliness and recyclability, is widely used in scenarios such as cartons, handbags, file folders, and packaging paper bags. However, its surface is rough, the fibers are tough, and it is prone to shedding fibers. During die-cutting, problems such as edge burrs, paper debris embedding in the spring pad, and incomplete die-cutting may occur. The conventional spring pad has insufficient wear resistance and poor debris removal, which leads to rapid wear of the spring pad and frequent production shutdowns for cleaning. Deephua Printing Materials focuses on the pain points of die-cutting of Kraft paper and develops special knife plate spring pads for Kraft paper. Through high wear resistance and easy debris removal design, it achieves efficient and stable die-cutting, reducing cleaning and loss costs.

In terms of material optimization, a high wear-resistant composite rubber formula is adopted, with silicon carbide wear-resistant particles and anti-debris components added. The surface hardness of the spring pad is increased to Shore A 65-70, reducing the wear coefficient by 40%. This can effectively resist the frictional wear of the rough surface of Kraft paper and reduce the probability of paper debris embedding in the spring pad texture. The material toughness is also optimized to avoid tear and shedding of the spring pad caused by fiber scraping, and the service life is extended by more than 50% compared to conventional spring pads. To address the problem of paper debris shedding, the surface of the spring pad adopts a coarse texture for debris removal, with a texture depth of 0.2mm. It can quickly guide the paper debris to fall into the dust collection device, avoiding jamming and blockage of the spring pad. In terms of structure and adaptation design, the edge of the spring pad is treated with thickened sealing treatment to prevent paper debris from seeping into the internal part of the spring pad, causing aging and elastic attenuation of the spring pad. A multi-thickness specification of 1.5-3.0mm is launched, suitable for the die-cutting requirements of different thicknesses of Kraft paper (0.3-1.0mm). The thickness error is controlled within ±0.04mm, ensuring uniform pressure across the entire sheet and avoiding local cutting failure or local collapse. After applying this solution to a Kraft paper handbag enterprise, the edge burr rate of Kraft paper die-cutting decreased from 9% to 0.5%, the spring pad replacement cycle was extended from 3 days to 12 days, and the time for shutdown and cleaning of paper debris was reduced by 80%, significantly improving production efficiency.